Stone insert



FIG. 1 is a perspective view of the stone insert.

FIG. 2 is a front view of the stone insert.

FIG. 3 is a back view of the stone insert.

FIG. 4 is a left side view of the stone insert.

FIG. 5 is a right side view of the stone insert.

FIG. 6 is a top view of the stone insert; and,

FIG. 7 is a bottom view of the stone insert. 

CLAIM The ornamental design for a stone insert, as shown and described. 